Name____________________________________________________________Period_____Date__________________
PAP Chemistry Homework HW # 1
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1.
Write each of the following numbers in exponential notation:
a) 531,100
__________
b)
0.00000003753 __________
c) 64300
__________
d)
0.0033165
__________
e) 0.08316
__________
f)
9335
__________
2.
Convert each of the following numbers in exponential notation to conventional decimal form:
a)
2.234 x 10-5 ______________
d) 2.935 x 10-3 ______________
b)
9.33 x 102 ______________
e) 7.35 x 10-2 ______________
c)
4.230 x 104 ______________
f) 8.138 x 10-12
______________
3.
Rewrite each number with a coefficient between one and ten (in other words, write each number in CORRECT
scientific notation:
a)
3275 x 103 ______________
d) 433.9 x 10-1 ______________
b)
92 x 10-4
______________
e) 0.01365 x 10-2 ______________
5
c)
0.6311 x 10
______________ f)
0.0641 x 106
______________
4.
How many significant figures are in each of the quantities listed below:
5.
a)
4354 mg
__________
d)
0.06380 km __________
g)
0.153336 g
__________
b)
0.03353 L __________
e)
3310.0 mL __________
h)
0.00360 g
__________
c)
532.20 mL __________
f)
3 x 107 kg __________
i)
1.8398 x 10-3 g
__________
j)
25300 m
__________
Round off the given quantity 37.7358064 to the number of significant figures indicated:
one ____________________ three _____________________ five _____________________
two _____________________ four _____________________ six
6.
_____________________
Perform the indicated calculation and express the answer in the correct number of significant figures:
0.370  843  0.0704
 _____________________
0.0042  17.10
7.
Complete the following operations and round off the answers to the proper number of significant figures:
a)
8.
18 .7 - 0.56  _____________________
b)
1.59  10 -4 - 6.42 x 10 -5  _____________________
Round off the quantity 34.1036738 to the number of significant figures indicated:
one _____________________ three _____________________ five _____________________
two
9.
_____________________ four _____________________ six
_____________________
Express each of the following in correct scientific notation with the correct number of significant figures:
a) (5.68 x 10-4) x (6.532 x 104)
_______________
b) (7.5333 x 105) x (1.56 x 10-9) _______________
10.
Express each of the following in correct scientific notation with the correct number of significant figures:
a) (6.7334 x 10-8) / (2.34 x 106) _______________
b) (1.345 x 109) / (9.35 x 10-7)
_______________